General-purpose Air Velocity Transducers - Discontinued

FMA-900 Series

 | FMA-900 Series

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1 ano de garantia CE
  • NEW Remote Electronics Opiton (-R)
  • 1.5" Pipes and Larger
  • 1.5% Accuracy
  • Each Unit Individually Calibrated -
    4 Point Certificate of Compliance
  • Durable Fast-Response Platinum Sensors
  • Compact Solid-State Electronics
  • Directly Monitors True Air Mass Velocity
  • Linear 0-5 Vdc or 4-20 mA Output
  • 400 msec Response Time
  • Economical Insertion Design


The FMA900 Series has been discontinued. Please see the FMA900A Series as a possible alternative or contact our Flow Engineering Department.

The unique FMA-900 air velocity transducer utilizes both a velocity sensor and a temperature sensor to accurately measure air velocity (in SFPM, standard feet per minute). The built-in temperature sensor automatically corrects the flowrate for temperature variations. Both sensors are rugged glass-coated platinum resistance detectors (RTDs). The circuit heats the velocity sensor to a constant temperature differential above ambient temperature and measures the cooling effect of the air flow. This design provides excellent low velocity sensitivity and high accuracy. The FMA-900 also features negligible pressure drop. To obtain mass flowrate in SCFM (standard cubic feet/minute), the SFPM velocity indicated by the FMA-900 is multiplied by the cross-sectional area of the pipe or duct in square feet. A traverse across the pipe or duct can be performed to determine the mounting location for average velocity indication. The FMA-900 can be mounted in pipes (down to 1.5" size) with the use of OMEGA ® SSLK compression fittings (SSLK-14-14). PTFE ferrules are required. (model T-FER- 14). Each unit is individually calibrated in OMEGA’s NIST-traceable wind tunnel. Suggested power supply; FPW-15, ($75)

The New Remote Electronics Option (-R) comes with a 12 foot cable from the sensor to a quick disconnect connector and then to the mating connector with two feet of wire which connects directly into the electronics box. The electronics box has another connector on the opposite side with a 15 foot cable with strip leads. A total of 30 feet of cable. Designed for tight spaces.

Accuracy: 1.5% FS @ room temp. Add ±0.5% of reading from 0 to 50°C (32° to 122°F); add 1% FS below 1000 SFPM
Repeatability: ±0.2% FS
Initial Stabilization Time in Flow: 40 sec
Response Time/After Stabilization: 400 msec to within 63% of final value at room temperature
Probe: Aluminum oxide ceramic glass coating, epoxy; probe body 304 SS
Probe Temperature: -40 to 121°C (-40 to 250°F)
Probe Pressure: 150 PSIG Max
Electronics Temperature: 0 to 50°C (32 to 122°F), operating; 0 to 70°C (32 to 158°F), storage Operating Relative Humidity: less than 80% RH, without condensation Ambient Temp Compensation: about 5 min for 11°C (20°F) temp change
Outputs: 0 to 5 Vdc or 4 to 20 mA
Voltage Load Resistance: 250 ohms minimum
Current Loop Resistance: 0 ohms min. to 400 ohms max.; 4 wire
Power: 15 to 24 Vdc,300 mA (0 to 100 and 0 to 200 SFPM only); 15 to 18 Vdc, 300 mA (all other ranges)300 mA (0 to 100 and 0 to 200 SFPM only); 15 to 18 Vdc, 300 mA (all other ranges) 300 mA (0 to 100 and 0 to 200 SFPM only); 15 to 18 Vdc, 300 mA (all other ranges)
Accessories: Mating connector pre-wired to 15' shielded cable (with built-in ferrite core) included
Case: 89 H x 51 W x 31.8 mm D (3.5 H x 2 W x 1.25" D)
Probe: 6.35 mm (0.250") O.D., 330 mm (13") length, optional 3.75" available (-S)
Weight: 160 g (5.6 oz)

Please download PDF file below for full product specifications

NOTE: The FMA-900 Series has been replaced by the FMA1000 Series
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